import cv2
import numpy as np
img=cv2.imread('build.png')
cv2.imshow('Input',img)
gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
orb=cv2.ORB_create(nfeatures=2000)
kp,des=orb.detectAndCompute(gray,None)
img=cv2.drawKeypoints(gray,kp,img)
cv2.imshow('drawKeypoints',img)
print('kp.shape:',np.shape(des))
cv2.waitKey()
cv2.destoryAllWindows()